photography: 3 - shutter speeds

Download Photography: 3 - Shutter Speeds

Post on 05-Sep-2014




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CONTAINS EMBEDDED ANIMATIONS - DOWNLOAD FOR FULL EXPERIENCE! A quick recap on lenses - then some fun with shutter speeds!


  • Lenses are come in different sizes: 70mm = Telephoto Zoom = Combines all three into one 24mm 50mm 70mm
  • DOF refers to how much of a photo is in focus: The smaller the f-number, the smaller the DOF:
  • In your camera between the lens and the film/CCD - is the shutter Video on next slide
  • Think of it as a door that opens for a split second to allow the image of your subject to burn onto the film/CCD
  • As the photographer you have control over how long this door is open Typically this will range from 1/1000th of a second (very, very fast) to 1 or 2 seconds (very slow)
  • The longer the shutter is open, the more chance there is that something in your subject will move, for instance the train appears still
  • But at a slower shutter speed the train has travelled an inch or so while the shutter was open so the train blurs
  • And at a very slow speed the train moves so much that it barely registers on the photo and becomes ghost-like
  • Notice the blurred horses legs
  • Faked with Motion Camera Android phone app Not true motion blur Lo Res images (480x320)
  • Notice the sharpness of the legs
  • If you use a shutter speed slower than 1/60th of a second your photos will suffer from camera shake (your hands cant hold a camera that still for that long!):
  • Slow Fast or in old money
  • For slow speeds youll need a tripod: or wedge your camera against something solid:
  • Fast Shutter Speed Slow Shutter Speed
  • Either: Set your camera to Shutter Priority mode and take a series of photos of the same moving subject at different shutter speeds Or, if your camera does not have Shutter Priority, go to and experiment with the shutter speed slider
  • A Quick Overview
  • Opening the shutter exposes the film/CCD to light Too little light causes under-exposure, too much causes over-exposure:
  • Youll remember that Aperture gives us Depth of Field by changing the size of an iris in the lens: Think of the iris as a curtain that you can open or close
  • By opening or closing the iris you control the amount of light getting through it just like closing a curtain to block out the sun on a bright day This can be used to compensate for under or over exposure, so the iris can be opened (perhaps to f2.8) to let in more light when using a fast shutter speed, or the iris can be closed (f16) to let in less light with a slow shutter speed
  • Fast Shutter / Wide Aperture (f2.8) Slow Shutter / Narrow Aperture (f16)
  • This is the tricky part of photography to get your head around Well keep coming back to it over the next few weeks >>>END


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